Guy Fieri rolls out to Kelly's Diner in Somerville, Mass. for the secrets of a fresh New England lobster roll; The Bay Way Diner in Linden, N.J. for oven roasted top round Philly cheese steak; and the Beacon Drive-in in Spartanburg, S.C., where the specialty is the A-Plenty, a meal or sandwich covered in French fries and homemade onion rings.